5 Installation at Site
22 of 68
Vitaprime
CAUTION
Incorrect earthing during welding work at the piping
Destruction of rolling element bearings (pitting effect)!
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Never earth the electric welding equipment on the pump or baseplate.
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Prevent current flowing through the rolling element bearings.
NOTE
Installing check and shut-off elements in the system is recommended, depending on
the type of plant and pump. However, such elements must not obstruct proper
drainage or hinder disassembly of the pump.
CAUTION
When handling gaseous fluids or fluids which tend to froth, the pump will not be
self-priming.
Pump is running, but does not deliver!
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Install a check valve in the suction line.
ü
Suction lift lines have been laid with a rising slope, suction head lines with a
downward slope towards the pump.
ü
A flow stabilisation section having a length equivalent to at least twice the
diameter of the suction flange has been provided upstream of the suction flange.
ü
The nominal diameters of the pipes are equal to or greater than the nominal
diameters of the pump nozzles.
ü
Adapters to larger nominal diameters are designed with a diffuser angle of
approx. 8° to avoid excessive pressure losses.
ü
The pipelines have been anchored in close proximity to the pump and connected
without transmitting any stresses or strains.
1. Thoroughly clean, flush and blow through all vessels, pipelines and connections
(especially of new installations).
2. Before installing the pump in the piping, remove the flange covers on the
suction and discharge nozzles of the pump.
CAUTION
Welding beads, scale and other impurities in the piping
Damage to the pump!
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Remove any impurities from the piping.
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If necessary, install a filter.
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Observe the information in (
ð
Section 7.2.2.2, Page 41) .
NOTE
Use a filter with laid-in wire mesh (mesh width 0.5 mm, wire diameter 0.25 mm) of
corrosion-resistant material.
Use a filter with a filter area three times the cross-section of the piping.
Conical filters have proved suitable.
3. Connect the pump nozzles to the piping.
Содержание Vitaprime
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